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NSPM01串行端口模块
IT系统在IT网络中，配电系统没有连接或者它只有一个高阻抗连接。
在这种系统中，绝缘监测装置用于监测阻抗。
绝缘监测装置监测未接地有源相导体和大地之间的系统。
它旨在发出警报（灯光和声音）或断开当两个电源之间的阻抗导体低于设定值，通常为50 kΩ。当高可靠性需要电源，例如应急照明系统。
由于在接地故障不足以使MCB跳闸或RCB使用不同的保护装置未接地系统。
绝缘监测器持续检测绝缘对地电阻，并在超过阈值。
绝缘监测继电器是唯一的技术解决方案
检测未接地系统中的接地故障。
ABB的报价一览表
–模块化设置
–3种产品用于交流和直流系统
–直接连接到690 V AC和1000 V DC系统
耦合模块
–额定频率15-400 Hz
–中断电线监控
–不正确的设置监控
–启动后通过实施系统测试确保船上安全
–在正面或通过控制重置和测试可能性联系
–新的预测测量原则附加监控功能CM-IWS公司。1和CM-IWN.1
–当中断的电线监控被激活时CM-IWN公司。1台自动监测网络/测量系统启动时的电路连接L+和L-。这可以通过激活测试随时重复作用CM-IWN公司。1和CM-IWS。
1个周期性监测测量电路连接和导线中断的KE。
如果其中一个连接中的电线中断输出继电器切换到故障状态。
–此外，未接地交流、直流或交流/直流系统监测不允许的泄漏电容。如果系统泄漏电容过高，输出继电器开关或输出继电器切换到故障状态。
–也可能导致功能故障的不正确设置
对设备进行监控。当设备检测到这种情况时设置不正确，输出继电器开关或输出继电器切换到故障状态。
–一旦施加了控制电源电压，绝缘监测继电器将运行一个系统测试程序。对系统进行诊断并测试设置。如果没有在该测试程序完成后，发现内部或外部故障完成后，输出继电器切换到可操作状态
状态–按下正面组合测试/重置按钮a执行系统测试例程。输出继电器切换至故障状态，只要测试功能激活控制触点S1-S3闭合或测试功能处理。
IT-system In an IT network
the distribution system has no connection to earth at all, or it has only a high impedance connection. In such systems, an insulation monitoring device is used to monitor the impedance. An insulation monitoring device monitors the ungrounded system between an active phase conductor and earth. It is intended to give an alert (light and sound) or disconnect the power supply when the impedance between the two conductors drops below a set value, usually 50 kΩ.Isolated systems are used whenever a high reliability of the supply is needed, e.g. emergency lighting systems. Due to the fact that the energy released in case of an earth fault will not be suffient enough to trip an MCB or RCB a different protection device is to be used in unearthed systems. An insulation monitor constantly detects the insulation resistance to earth and releases a signal whenever the thresholds are passed. Insulation monitoring relays are the only technical solution to detect an earth fault in an unearthed system. ABB’s offer at a glance – Modular set up – 3 products for AC and DC systems – Direct connection to 690 V AC and 1000 V DC systems with the coupling module – Frequency rating 15-400 Hz – Interrupted wire monitoring – Incorrect setting monitoring – Safety on board by implemented system test after start-up – Reset and test possibility at the front face or by control contact – New prognostic measuring principle
Additional monitoring functions
CM-IWS.1 and CM-IWN.1 – When interrupted wire monitoring is activated, the CM-IWN.1 automatically monitors the network/measuring circuit connections L+ and L- when the system starts up. This can be repeated at any time by activating the test function. CM-IWN.1 and CM-IWS.1 cyclically monitor the measuring circuit connections and KE for wire interruption. In case of a wire interruption in one of the connections, the output relays switch to the fault state. – In addition, the unearthed AC-, DC- or AC/DC system is monitored for inadmissible leakage capacitance. If the system leakage capacitance is too high, the output relay switches or the output relays switch to the fault state. – Also incorrect settings that could cause a faulty function of the device are monitored. When the device detects such an incorrect setting, the output relay switches or the output relays switch to the fault state. – Once the control supply voltage has been applied the insulation monitoring relay runs through a system test routine. The system is diagnosed and the settings are tested. If no internal or external faults are found after this test routine is completed, the output relays switch into the operational state. – By pressing the front-face combined test/reset button a system test routine is executed. The output relays switch to the fault state as long as the test function is activated, the control contact S1-S3 is closed or the test functions are processed.
